Container



l. L. WILCOX Dec. 14, 1943.

CONTAINER Filed March 6, 1941 ATTORNEYS.

Patented Dec. 14,

CONTAINER A N. Y., assignor to Oswego Isaac L. Wilcox,.Fulton,

`Falls Corporation,

oi' New York Fulton, N. Y., a corporation Application March s, 1941,serial No. 382,035 I romans. (ci. 229-37) This invention relates tocontainers formed from sheet fibrous material such as paper board andintended particularly for the packaging of `liquid products, such asmilk. More particularly the invention is directed to the' formation ofthe body and bottom end closure oi such a container.

This invention has as an object a paper container for liquid products,the container and the bottom end closure thereof being formed from aonepiece integral blank which has been previously coated to render thesamey entirely impervious to liquids/'for which the containers are to beused, and which has been previously processed, whereby it is onlynecessary to fold one end of the blank to form the bottom closure of thecontainer, and this bottom closure is hermetically sealed by a shortapplication of heat and without the application of any glue or adhesivein the dairy, all whereby the machinery for fabricating the containerand the time employedin the fabrication of the container is reduced to aminimum, the blanks from which the containers are made beingparticularly adapted to be expeditiously shaped and formed intocontainers by machinery. y

The invention consists in the novel features and in the combinations andconstructions hereinafter set forth and claimed.

In describing this invention, reference is had to the accompanyingdrawing in whichlike characters designate coi-responding parts in allthe views.

Figure 1 illustrates a blank from which the container may be formed.

Figure 2 is-a vertical sectional View. of the blank taken on line 2-2,Figure l.

Figure 3 is a top plan view oi' the container with the end closurepanels partially folded in- Wardly.

Figure 4 is a top plan view of the container as it appears with the endclosure completely sealed.

Figure 5 is a view looking into the interior of the container after theend closure panels have been folded and sealed in place.

Figure 6 is a sectional view taken on line 6 8, Figure 5.

'Ihe container is formed from a at blank, as shown in Figure l, providedwith spaced longitudinal score lines Ill deiining oppositely disposedside Wall panels II, I2 and a side wall lap I3. The blank is alsoprovided with a transverse- 1y extending score line IB spaced from oneend thereof to form inwardly folding end closure panels. Thesepanels,adjacent the side panels I2, are provided with converging score linesli'which define triangular shaped portions I8, I1. 'I 'heend panels I8,adjacent the of rectangular formation.

The end closure is formed by'iirst folding the triangular panels I6inwardly and subsequently folding the panels I0 inwardly. The dimensionsof the panels are such that the apex'es of the panels I6 meet at thecenter of the container, and the edges of the panels I8 abut. The blankside panels I l, are

is scored and coated with a substance to render the blank, andaccordingly the subsequently formed container, impervious to liquids forwhich the container will be used.

For example, if the container is to be used for liquid food products.such as milk, I coat the blank with a vinyl resin such as the copolymerof vinyl acetate and vinyl chloride.`

In addition, to coating the inner surface of the blank, it is necessaryto coat any portion of the eds'eof the blank which may be exposed on theinterior of the container and which is contacted by the liquid contentthereof. To block off such exposed edge portions of the blank andthereby produce an entirely impervious contain-x er, a tape 20 isapplied to the lower edge of the blank and a similar tape 2| applied tothe side edge adjacent the side wall lap I3. The tapes 42li, 2l overliethe surface on opposite sides of the blank adjacent the edge thereof.The tapes 20, 2l are formed of impervious sheet material which, atnormal temperatures, presents a. hard,

'non-tacky, surface and which is heat sealable.

I prefer the tapes'20, 2I to be formed out oi the same material withwhich the blank proper is coated. The scoring, coating and applicationof the tapes 20, 2I, is done at the container manufacturing plant, theimpervious coated blanks being shipped to the dairy or Packaging. plantin flat formation.

The blanks are shaped to tubular formation with the side wall lap I3overlying the marginal surface adjacent the panel II and is securedthereto through the medium of the tape 2| by a short application ofheatA and pressure thereto. The blank is shaped to ,tubular form upon aI suitable mandrel and while positioned on the portions;` of the panelsare securely sealed together.

What I claim is: Y

1. A container comprising a tubular body, a tape consisting oi a stripoi impervious heat sealing adhesive material secured to one end of thebody and overlying the inner and outer surfaces of the body adjacentsaid end, said end portion Y of the body being formed with inwardlyfoldable end closure panels arranged in overlapping relation, and saidtape serving to eiectively seal the l overlapping portions of saidpanels.

2. A container comprising a blank of sheet material formed into atubularbody rectangular panels.

ISAAC L. WILCOX.

